Manufacture of articles from aqueous dispersions of rubber and similar vegetable resins or compounds thereof



Patented June 1 1931" I tslt ay GEORGE enArraM-rrmnnron, or nnnrnsrom n'rnrrrneniemfnnenann, nssrenoa To "AMERICAN ANODE, Inc, or nxnon, 10, A .oonronn'rron or nnr-nwnnn;

- MANUFACTURE No Drawing. Application filed March This invention comprises improvements in or relating to the. manufacture of articles from aqueous dispersions of rubber and similar vegetable resins or compounds thereof.

- by vulcanizing the dried deposit in a press having a surface thereon adapted-to mould the desired pattern thereon, It is the object of this invention to' provide an improved marking or patternupon such articles for ticles manufactured direct from aqueous disexample, rubberv tobacco pouches, bathing caps andthe like. i V p According to this-invention I produce arpersions which have an irregular embossed marking thereoniwhich maybe likened to a water-mark except that there are definitecorrugations in the-articles. This effect 1s attaine'djby holding the deposit from the dis- Y *persions' after'dryingv between two plates of metal or other suitable materials the said plates having surfaces which mayor may not have shallow groovesor other engraved markings and then vulcanizing the same in a suitable heated liquid with or without the applicationof pressure to the plates. If the plates have grooves it is found that the markmgs do not,.necessarily follow. the pattern of the grooves. For a shapedarticle the, plates should conform to the external and internal shapes respectively of the finished articles.

For example, ifit is desired to produce a tobacco, pouch of india rubberr with a pattern 22, 1928,,Seria1No. 263,980, and in Great Renewed December 10, 1930.

Britain March 29, 1927.

or'An'rIoLns FROM AQUEOUS nrsrnnsrons arsenal. nn SIM I LAB, VEGETABLE RESINS on oolvrronnns THEREOF a: of this description, I forma pouchby electrophoresis upon the anodein a bath containing rubber latextogether with the necessary compounding ingredients. The product is subsequently dried by any suitable method After stripping the pouch is placed between.

two plates of zinc andkept in position by rubberibands or other suitable meanswherev .65 nat'uralor artificial partly vulcanizedor une vulcanzed emulsionsof other rubber-like sub stances as for example, gutta-percha or balata with or without additional substances;

1. The method of producin irregular markings on the surface of rub er articles which comprises forming a rubber deposit from an aqueous d spersion of rubber, drying.

the deposit, confining the'dried deposit "bee tweensuitably shaped plates,1and immersing j the deposit togetherKwith the plates ina heated liquid. p

.2. The method} of producing irregular markings on thesurface of] rubber articles which comprises forming a deposit from an aqueous emulsionof rubber, drying the deposit, confining the dried deposit between suitably shaped plates andfimmersing the de-- posit together with the plates in hot water.v

3.'The method: of producingiirregular markings onthe surface of rubber articles which comprisesforming a depositfrom an aqueousdispersion of rubber, drying the deposit, confinlngthe deposit between smooth metallic surfaces and immersing the confined deposit in hot water.

l. Irregularly marked rubber products re- 7 sulting from the vulcanization of dry de- I "posits derived from aqueous rubber dispersions in a bath of heated liquid, in contact with suitably shaped plates.

5. Irregularly marked rubber articles resulting from the vulcanization ofdry de- 7 posits derived from aqueous rubber dispersions in a hot water bath, in contact with engraved Inetallicplates. v r

In witness whereof, I have hereunto signed my name.

GEORGE GRAHAM THORNTON. 

